pre: Standard
Flop: maybe I should go to 1 $ or something because of possible FD
Turn: Should probably have been a little bigger here as well. Like 2,2 $ ?
River: Since he just called all the way I thought the chance of him having a flush here is high. The only thing that bothered me is that LAG-players often makes small bets when they acculy got a hand, but that's not of course all of them and since I didn't have so many hands on him I ended up folding.

River: I would play c/f actually. Pretty weak maybe, but this guy looks like he isn't aggressive enough (or maybe smart enough
) to bluff this river, but would rather check behind with whatever he could be calling down. If he bets you're beaten here imo, and pot is too big to play bet/fold.. so I'd C/F

By the way, you can't call this guy a LAG... he's much too passive and doesn't raise enough preflop.